Description
Install, inspect, repair, and calibrate control, safety-relief, and isolation valves and associated actuators, positioners, and regulators to maintain accurate flow and pressure control, leak integrity, and safe, reliable operation of process systems.
- • Open or close valves to start up, regulate, or shut down system flows during service.
- • Adjust valves to control flow rates and pressures per specifications.
- • Report hazardous field conditions and damaged or malfunctioning valves or regulators.
- • Record valve settings, calibrations, and service data in work orders or CMMS.
- • Bench-test and calibrate regulators and control valves on test stands to meet inlet/outlet pressure specifications.
- • Disassemble, inspect, and repair valves and actuators, including control, safety-relief, and isolation types, using hand and power tools.
- • Document maintenance results, test readings, materials used, and repairs performed.
- • Remove defective or obsolete valves, actuators, and accessories.
- • Lubricate valve stems, actuators, and moving parts as specified.
- • Pressure-test and leak-check valves and regulators; verify setpoints with precision instruments.
- • Install regulators, control valves, actuators, positioners, and related instrumentation.
- • Isolate lines, depressurize systems, and coordinate with operations for major piping or equipment repairs, following lockout/tagout procedures.
- • Inspect valve bodies, trim, seats, packing, and linkages for wear, corrosion, or damage; tag items needing repair.
- • Connect test hoses and blinds to valves or lines and monitor gauges for pressure loss to detect leaks.
- • Overhaul valves by replacing trim, stems, seats, seals, diaphragms, springs, and packing.
- • Advise customers or plant personnel on valve selection, installation, operation, and maintenance.
- • Set up test benches or calibrators; zero instruments and verify baseline readings before testing.
- • Adjust actuators, positioners, and linkages to achieve specified response and travel.
- • Replace defective components such as bellows, diaphragms, range springs, o-rings, and seats; reassemble per drawings and OEM manuals.
- • Investigate abnormal flow, pressure, leakage, or tampering indicators and report findings.
- • Install, inspect, and test valve positioners, solenoids, limit switches, and actuators to diagnose malfunctions.
- • Trace and tag process lines and valve locations per P&IDs.
- • Mount and align pneumatic, hydraulic, or electric actuators and accessories on valves.
- • Vary supply air or hydraulic pressure to assess regulator and actuator performance.
- • Measure tolerances of valve parts with gauges, micrometers, and calipers to verify specifications.
- • Lap or reface seats and plugs; reseal bellows and packing per procedures.
- • Clean valve bodies and moving parts; remove debris, scale, and deposits.
- • Repair and wire electrical components of actuated valves, such as limit switches, solenoids, and positioners, per schematics.
- • Machine or recondition seats and plugs; tap ports and prepare components to salvage usable parts.
- • Terminate and connect actuator and positioner wiring to junction boxes or control panels.
- • Remove corrosion, paint, or rust from valve exteriors using brushes, scrapers, or sandblasting.
- • Calibrate positioners, I/P transducers, gauges, and regulators for accurate pressure and flow control.
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Tasks & skills:
O*NET occupational data (work activities, skills, knowledge).
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This site includes information from O*NET by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA), used under the CC BY 4.0 license. Career Clutch has modified some of this information for student readability. USDOL/ETA has not approved, endorsed, or tested these modifications. O*NET® is a trademark of USDOL/ETA.
Last reviewed: Jan 2026
